On a warm summer day, a large mass of air (atmospheric pressure 1.01 x 105 Pa) is heated by the ground to a temperature of 30.0 °C and then begins to rise through the cooler surrounding air. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Adiabatic compression in a diesel engine. Part A Calculate the temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.90x104 Pa. Assume that air is an ideal gas, with y = 1.40. (This rate of cooling for dry, rising air, corresponding to roughly 1 °C per 100 m of altitude, is called the dry adiabatic lapse rate.) Express your answer in degrees Celsius.

On a warm summer day, a large mass of air (atmospheric pressure 1.01 x 105 Pa) is heated by the ground to a temperature of 30.0 °C and then begins to rise through the cooler surrounding air. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Adiabatic compression in a diesel engine. Part A Calculate the temperature of the air mass when it has risen to a level at which atmospheric pressure is only 8.90x104 Pa. Assume that air is an ideal gas, with y = 1.40. (This rate of cooling for dry, rising air, corresponding to roughly 1 °C per 100 m of altitude, is called the dry adiabatic lapse rate.) Express your answer in degrees Celsius.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

(b) Hairdryer is an electromechanical device that blows ambient or hot air over damp hair to speed the evaporation of water to dry the hair. To design a hairdryer, it should contain the following basic components: a duct of constant diameter with a few layers of electric coils, a small fan to pull the air in and force it through the heating coils. If the density of air is 1.18 kg/m³ at the inlet and 0.90 kg/m³ at the exit, calculate the percent increase in the velocity of air as it flows through the dryer.
Q.6.B. Four g of air is contained in the cylinder. The air is heated until the piston raises 30 mm. The spring just touches the piston initially. Calculate (a) the temperature when the piston leaves the stops and (b) the work done by the air on the piston. 400 kN/m Frictionjess piston 300 kg Air 150 mm 200 mm IT
DESCRIBE THE ENERGY ANALYSIS OF STEADY-FLOW SYSTEMS
A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3/s of water? What is the effect of the water temperature on the pump power that is required? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.
2. If 37 kJ of heat is applied to a non-flow system while 54 kJ of work is done by thesystem, determine the magnitude of the change in the internal energy and explain thedirection of this change. Explain the relationships between system constants for a perfect gas
Early mountaineers boiled water to estimate their altitude. If they reach the top and find that water boils at 84°C, approximately how high is the mountain?
How much energy is required to raise 63 kg of ice at O degrees C to saturated steam at 100 degrees C.Specific heat capacity of water is 4.2 kJ/kg K.Specific latent heat of ice is 335 kJ/kg.Specific latent heat of steam 10 2,257 kJ/kg.
There is 10-kg of water at room temperature and pressure in a closed piston-cylinder. Boundary work is then done on the system, compressing it until the volume decreases to one-half of it's original value. If the internal energy of the system decreases by 700 kJ/kg during this process and 200 kJ/kg of boundary work is done on the system, how much heat has been removed from the system, in kJ. Assume that system is sitting on a lab bench.How much heat is removed from the system, in kJ?
One kilogram of air is compressed from a volume of 1.0 m and a pressure of 100 kPa to a volume of 0.147 m and a pressure of 1000 kPa. Assuming that the compression follows the law pu" the work done during the compression process. = constant, find
Brine enters a cooler at the rate of 5,000 gal/hr. at 75°F and leaves at 21°F. Specific heat and specific gravity of brine are 1.27 kJ/kg-°K and 1.2, respectively. Calculate the heat transferred in Hp.
A torque of 2 N-m is necessary to rotate a paddle wheel at a rate of 20 rad/s.The paddle wheel is located in a rigid vessel containing a gas. What is the net work injoule done on the gas during 10 minutes of operation?
Atmospheric air is to be pressurized to 10Mpa. What is the power required if it is: single stage, 5-stage, 8-stage? (Three items) As an engineer, how many stages (choose from 1, 5, 8) would you pick for that particular operation? Why? Please answer this immediately. Thank you!